And will



\ (No Model.) V 2 Sheets-Sheet 1.

F. L. MAGAW.

CHAIN SAWING MAGHINE. No. 279,780. Patented June 19,1883.

2 t e e h S p m e h S 2 H N m W0 A M G N MI .W Lu Rm A H C (No Model.)

Patented June 19, 1883.

Retains raisin.

FEEDERIcK L. MAGAW, or FLATLANDS, NEW YORK, ASSIGNOR E Two- THIRDS T0 JOHN A. PEER, or GRASS VALLEY, cALIEonnr-A, AND WILL- 1AM o. Eons, or BOSTON, MAssminnsErTs. i

ci-min sAwine mAca-nns.

SPECIFICATION forming part of Letters Patent No. 279,780, dated June 19, 1.8a.

Application filed August 23, 1852. I (No model.)

To all whom it may concern.-

are erected standards B, in which are mount-' 50 Be it known that I, FREDERICK L. MAGAW, ed drums (.1 (1', supporting a number of saws,

of Flatlands, in the eountyroi Kings and State of New York, haveinvented a certain new and useful Improvement in Chain Sawing-Machines, of which the following is a specifica' tion.

The improvement consists in a saw composed of a number of teeth made injhe form of links, and having mortised and rounded ends prov ided with integral pivots and a numberot' intermediate connecting links severally composed of longitudinal sections having rounded ends moitiscd' and perforated to fit the inte '15 gral pivots of the toothed links, and secured together by rivets'or like devices.

The improvement also consists in a saw comprising a number of links, each forming the stock of a tooth, detachal'ile faces secured ,to

the projecting portions of the stocks by means of dovetailed tongues and grooves, which are prefer: bly tapered lengthwise, and intermediate links connecting the links on which are the teeth."

'lhc imp"ovement also consists in the combination, with a number of saws made in the form of chains, of drums for supporting the same, composed of a number of periphericallygrooved disks for receiving the several saws, and secured together on shafts upon which they iit, whereby provision is afforded for readily arranging the saws at different distances apart, so that they will produce boards of different thickness.

In the accompanying dnawings, Figure 1 is a plan of a machine embodying my improve,- ment. Fig. 2 is aside elevation of the same. Fig. 3 is an end view thereof. Fig. i is an enlarged sectional View of one of the'drums for supporting the saws. Fig. 5 is an enlarged side view of a portion of one of the saws. Fig. 6 is a view of the inner edge of the same. 7 is a view of the outer edge of one of the toothed links, and Fig. 8 is a transverse seetion of the same.

Similar letters of reference designate corresponding parts in all the figures.

A designates the base-piece of the machine.

It may be of any suitable construction. On it,

I), which are made in the form of endless chains.

E designates a bed, which is supported by anti-friction rollers F, mounted in bearings on 5:, thc'fbase-piece A of the machine, and is free to move longitudinally back and forth transversely to the saws D. It is providedon the under side with toothed racks a, with which engage gear-wheels b, affixed to a rotary shaft and serving to impart motion to it.

G G designate holders for a log, H, which isdesigned to'bcsawed into boards. Theseholders are arranged opposite the spaces-be tween the saws D, and are of such thickness that they can pass between the latter andjallow them to cut through the ends of the log. When the saws thus cut' through the ends of the log, the boards out off will still be held in place bythe holders. The holders Gare af- 7o fixed to a stock-pieee, I, which may be made in the form of a carriage adapted to travel along the bed and to'be secured thereto in different positions; but as here shown it is affixed to the bed so as to maintain but one po- 7 5 sition thereon. The holders G may be secured in the stock-piece I in any suitable manner. and maybe maintained at'the desired distances apart by spacing-pieces, which may be re moved and replaced by others to provide for 8d adjusting the holders at diflerent distancesf apart. The holders (1" are arranged in a stock-piece,

I, which is made in the! form of a carriage adapted to be shifted along the bed into differout positions to suit logs of diit'erent lengths.

It is shown as secured' in position by means of a ratchet-toothed rack, c, and a pawl-like lever, (1., The holders G are fitted in recesses 'in the stock-piece '1, so that they can slide ion on The saws D comprise links a, each of which is provided with, asingle tooth, and which have their ends mortised and provided with integral pivots f. These links are connected by intermediate links, g, which are severally composed of two longitudinal sections having the sides of their end portions mortiscd 'and provided 'ith perforations to fit the end portions of the links 0. Rivets or other devices,

h, fasten vthescctions of '-the links 9 together,

and thereby secure them to the-links e. The links a are so shaped as to form the stocks of the teeth, and have detachable faces i, which are fitted to the teeth by means of tongues and I 5 grooves, which are dovetailed, as best shown in Fig. 8, and which preferably taper rearwardly, so that they may wedge and lock.

These faces may be renewed when desirable or removed for Sharpening. The links apreter- 2o ably have recesses j whereby they may engage with teeth or spurs on one or both of the drums C C. The drums 0-0 are severally composed of a number of disks in ving in theirperiphcries grooves adapted to accommodate the saws and guide them. *The disks composing the drums are slipped over shafts and retained there by heads,'which are secured there by nu't-s screwed on the shafts. v Disks of difi'erent thicknesses may be eming-pieces maybe interposed between the disks for this purpose.

respondingly spaced.

What I claim as my invention, and desire tosecure by Letters Patent, is I ployed to space" the saws differently; or spac- When the saws are differ? ently spaced, the holders must of course be cor- VYitne'sses:

1. A saw composed of a number of teeth made in the form of links and having mortised and rounded ends provided with integral pivots, and a number of intermediate connecto ing-linksseverally composed of longitudinal sections having rounded ends mortised and perforated to fit the integral pivots of the toothed links, and securedtogether by rivets or like devices, substantially as specified.

2. A saw comprising a number of links, each forming the stock of a tooth, detachable faces secured to the projectingportions of the stocks by means of dovetailed tongues and grooves, and intermediate links connecting the links on .which are the teeth, substantially as specified.

3. A saw comprising a number of links, each forming the stock of a tooth, detachable faces securedto the proj ccting portions of the stocks by means of dovetailed tongues and grooves which are taperedlongitudinally; and intermediate links connecting the links on which are the teeth, substantially as specified.

4. The combination, with a number-of saws made in the form of chains, of drumsvfor sup porting the same, composed of a number of peripherically-grooved disks for receiving the several saws, and secured together on shafts upon which they fit, whereby provision is atforded for readily arranging the saws at. dif ferentdistances apart, so that they will produce boards of difl'erent thickness.

FREDERICK MAGAW;

T. J. KEANE, v JAMEs R. BOWEN. 

